package com.hw.filter;

import com.sun.deploy.net.HttpResponse;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(filterName = "CheakFilter",urlPatterns = "/admin/*")
public class CheakFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request= (HttpServletRequest) req;
        HttpServletResponse response= (HttpServletResponse) resp;
        HttpSession session=request.getSession();
        Boolean d= (Boolean) session.getAttribute("code");

        /*先判断为空，在进行别的判断*/
        if (d==null || !d){
            response.sendRedirect("../login.html");

        }
        else {
            chain.doFilter(req, resp);
        }
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
